Revert "Get rid of unnecessary layouts on body elements with quirky children"

This reverts commit r169269. This is a speculative fix for the performance
tests timing out on the Win8 bot.

BUG=353275

Review URL: https://codereview.chromium.org/203463008

git-svn-id: svn://svn.chromium.org/blink/trunk@169514 bbb929c8-8fbe-4397-9dbb-9b2b20218538